Continual Warfare. During the last two centuries of the Middle Ages, there was almost continual warfare throughout all of Europe. The most famous, and longest, of these conflicts exemplifies all of the various wars of the late medieval period. Known erroneously as the Hundred Years' War (1337-1453), it began over disputed Continental lands.

England versus France. English king Edward III launched his attack on the French, seemingly in an attempt to recover his crown as king of France. In his view the crown had been "stolen" from him in 1328 when, despite being the closest heir to the dead king, Charles IV, he was declared ineligible because his royal descent was gained through a woman. The throne instead was given to a cousin, Philip of Valois, who was crowned as King Philip VI of France.